I just discovered that the threads on my mag post are stripped. I tried to "chase" the threads with a die, but the nut will not tighten up. My post is different from any shown in Lang's catalog. Mine has the threaded portion for the oil line connection. I don't know what to order to fix it.
I see by your profile you have a 1921. Would this correct your issue? https://www.modeltford.com/item/3260S.aspx